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Finding the Fourth Proportional to 18,676.44, 27,995.76 and 12,106.80

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Solution

The fourth proportional to 18,676.44, 27,995.76 and 12,106.80 is: 18,147.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.44 : 27,995.76 = 12,106.80 : x
  2. Step 2: Convert to fraction form
    18,676.44/27,995.76 = 12,106.80/x
  3. Step 3: Cross multiply
    18,676.44x = 27,995.76 × 12,106.80
  4. Step 4: Simplify right side
    18,676.44x = 338,939,067.17
  5. Step 5: Solve for x
    x = 338,939,067.17/18,676.44
  6. Step 6: Final answer
    x = 18,147.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.